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Check the user manual of the development board. 1.Which board you are using? Check the link below. https://sites.ualberta.ca/~delliott/ece492/appnotes/2015w/g5_ps2_controller/appnote%20-%20ps2%20keyb... https://eewiki.net/pages/viewpage.action?pageid=28278929 ftp://ftp.altera.com/up/pub/altera_material/15.0/university_program_ip_cores/input_output/ps2_contro... Best Regards, Anand Raj Shankar (This message was posted on behalf of Intel Corporation)Hello,
I think this issue was possibly alread answered: see: PS/2 keyboard not able to detect on the altera forum. (You will need to modify the ps2 header file and increase timeout.) Best Regards, Johi.For more complete information about compiler optimizations, see our Optimization Notice.